The QStyleOptionViewItem class is used to describe the parameters used to draw an item in a view widget. 更多...
| 頭： | #include <QStyleOptionViewItem> |
| 繼承： | QStyleOption |
| 繼承者： | QStyleOptionViewItemV2 |
| enum | Position { Left, Right, Top, Bottom } |
| enum | StyleOptionType { Type } |
| enum | StyleOptionVersion { Version } |
| QStyleOptionViewItem () | |
| QStyleOptionViewItem (const QStyleOptionViewItem & other ) |
| Qt::Alignment | decorationAlignment |
| Position | decorationPosition |
| QSize | decorationSize |
| Qt::Alignment | displayAlignment |
| QFont | font |
| bool | showDecorationSelected |
| Qt::TextElideMode | textElideMode |
The QStyleOptionViewItem class is used to describe the parameters used to draw an item in a view widget.
QStyleOptionViewItem contains all the information that QStyle 函數需要為 Qt 模型/視圖類繪製項。
For performance reasons, the access to the member variables is direct (i.e., using the
.
or
->
operator). This low-level feel makes the structures straightforward to use and emphasizes that these are simply parameters used by the style functions.
對於可以如何使用樣式選項的演示範例，見 樣式 範例。
另請參閱 QStyleOption and 模型/視圖編程 .
This enum describes the position of the item's decoration.
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionViewItem::Left
|
0
|
On the left of the text. |
QStyleOptionViewItem::Right
|
1
|
On the right of the text. |
QStyleOptionViewItem::Top
|
2
|
Above the text. |
QStyleOptionViewItem::Bottom
|
3
|
Below the text. |
另請參閱 decorationPosition .
This enum is used to hold information about the type of the style option, and is defined for each QStyleOption 子類。
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionViewItem::Type
|
SO_ViewItem
|
提供樣式選項的類型 ( SO_ViewItem 對於此類)。 |
類型內部使用通過 QStyleOption ，其子類，和 qstyleoption_cast () to determine the type of style option. In general you do not need to worry about this unless you want to create your own QStyleOption subclass and your own styles.
另請參閱 StyleOptionVersion .
This enum is used to hold information about the version of the style option, and is defined for each QStyleOption 子類。
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionViewItem::Version
|
1
|
1 |
版本的使用通過 QStyleOption 子類以實現擴展在不破壞兼容性的情況下。若使用 qstyleoption_cast ()，通常不需要校驗它。
另請參閱 StyleOptionType .
構造 QStyleOptionViewItem , initializing the members variables to their default values.
構造副本為 other 樣式選項。
This variable holds the alignment of the decoration for the item.
默認值為 Qt::AlignLeft .
This variable holds the position of the decoration for the item.
默認值為 Left .
另請參閱 Position .
This variable holds the size of the decoration for the item.
默認值為 QSize (-1, -1)，即：無效尺寸。
另請參閱 decorationAlignment and decorationPosition .
This variable holds the alignment of the display value for the item.
默認值為 Qt::AlignLeft .
This variable holds the font used for the item.
By default, the application's default font is used.
另請參閱 QFont .
This variable holds whether the decoration should be highlighted on selected items.
If this option is true, the branch and any decorations on selected items should be highlighted, indicating that the item is selected; otherwise, no highlighting is required. The default value is false.
另請參閱 QStyle::SH_ItemView_ShowDecorationSelected and QAbstractItemView .
This variable holds where ellipsis should be added for text that is too long to fit into an item.
默認值為 Qt::ElideMiddle , i.e. the ellipsis appears in the middle of the text.
另請參閱 Qt::TextElideMode and QStyle::SH_ItemView_EllipsisLocation .
